Jordan Cara M, Kim Sungwan, Glaviano Neal R
Department of Kinesiology, University of Connecticut, Storrs, CT, USA.
Institute for Sports Medicine, University of Connecticut, Storrs, CT, USA.
Physiother Theory Pract. 2025 Apr;41(4):695-703. doi: 10.1080/09593985.2024.2360578. Epub 2024 May 30.
Isometric hip strength seems to have limited association with frontal plane kinematics in individuals with patellofemoral pain (PFP), but little is known about the association with hip rate of torque development (RTD).
To explore the association of hip strength and RTD with trunk, pelvis, hip, and knee kinematics during a single-leg squat (SLS) in individuals with PFP.
Twenty individuals with PFP participated in this study. Hip abductor and extensor strength and RTD (early phase and late phase) were assessed using a hand-held dynamometer. Lateral trunk motion, pelvic drop, hip frontal plane projection angle (HFPPA), and knee frontal plane projection angle (KFPPA) were evaluated during a SLS using a two-dimensional motion analysis.
Lower early and late phase hip abductor RTD were moderately associated with greater HFPPA (early phase: = -0.501, = .025; late phase: = -0.580, = .007) and KFPPA (early phase: = -0.536, = .015; late phase: = -0.554, = .011). Lower early phase hip extensor RTD was moderately associated with greater pelvic drop ( = 0.571, = .009), HFPPA ( = -0.548, = .012), and KFPPA ( = -0.530, = .016). Hip abductor and extensor strength were not associated with any kinematic variables ( > .05).
Lower hip RTD, but not strength, was associated with greater frontal plane kinematics during a SLS in individuals with PFP, indicating that the ability to produce torque rapidly may be important for kinematic control during functional tasks.
在髌股疼痛（PFP）患者中，等长髋关节力量似乎与额状面运动学的关联有限，但对于其与髋关节扭矩发展速率（RTD）的关联却知之甚少。
探讨PFP患者单腿深蹲（SLS）过程中髋关节力量和RTD与躯干、骨盆、髋关节及膝关节运动学之间的关联。
20名PFP患者参与了本研究。使用手持测力计评估髋关节外展肌和伸肌力量以及RTD（早期和晚期）。在SLS过程中，使用二维运动分析评估躯干侧方运动、骨盆下降、髋关节额状面投影角（HFPPA）和膝关节额状面投影角（KFPPA）。
早期和晚期较低的髋关节外展肌RTD与更大的HFPPA（早期：r = -0.501，P = 0.025；晚期：r = -0.580，P = 0.007）和KFPPA（早期：r = -0.536，P = 0.015；晚期：r = -0.554，P = 0.011）中度相关。早期较低的髋关节伸肌RTD与更大的骨盆下降（r = 0.571，P = 0.009）、HFPPA（r = -0.548，P = 0.012）和KFPPA（r = -0.530，P = 0.016）中度相关。髋关节外展肌和伸肌力量与任何运动学变量均无关联（P > 0.05）。
在PFP患者的SLS过程中，较低的髋关节RTD而非力量与更大的额状面运动学相关，这表明快速产生扭矩的能力对于功能任务中的运动控制可能很重要。
